CN114055740B - Automatic die adjusting method for precision injection molding machine - Google Patents
Automatic die adjusting method for precision injection molding machine Download PDFInfo
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- CN114055740B CN114055740B CN202111457075.9A CN202111457075A CN114055740B CN 114055740 B CN114055740 B CN 114055740B CN 202111457075 A CN202111457075 A CN 202111457075A CN 114055740 B CN114055740 B CN 114055740B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/7653—Measuring, controlling or regulating mould clamping forces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/80—Measuring, controlling or regulating of relative position of mould parts
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- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses an automatic mold adjusting method of a precision injection molding machine, which comprises the steps of firstly constructing a mold adjusting information table which contains two columns of data: the first column of data is a 'mold adjusting position' (positive integer, unit is tooth), the second column of data is a 'minimum set pressure' (positive integer, unit is Bar), then when the mold is automatically adjusted in each subsequent time, the corresponding mold adjusting position is obtained from a 'mold adjusting information table' according to the high-pressure mold locking pressure of the precision injection molding machine set by a user, the mold can be automatically adjusted only by pressing the mold twice, the 'mold adjusting information table' is constructed once, in the subsequent automatic mold adjusting process, each time of mold adjusting data can be fed back to the 'mold adjusting information table', the 'mold adjusting information table' can be adaptively updated, the 'mold adjusting information table' is enabled to follow the state of a machine, and the mold adjusting speed is further optimized; the method has the advantages that automatic die adjustment can be completed only by twice die pressing, the die adjustment period is short, and compared with the existing method, the die adjustment time is shortened by about 19 seconds (55 percent) on average, and is shortened by 32 seconds (68 percent) at most.
Description
Technical Field
The invention relates to an automatic die adjusting method, in particular to an automatic die adjusting method of a precision injection molding machine.
Background
In the industrial field, precision injection molding machines play an irreplaceable role, wherein automatic mold adjustment of the precision injection molding machines is an important subject. After the precision injection molding machine is changed, the mold locking force is changed after mold closing due to the change of the thickness, the material and the like of the mold. Thus, the mold adjustment position and the mold are required to be adaptively adjusted so as to obtain a desired mold clamping force. Therefore, how to quickly and accurately realize the automatic die adjustment of the precise injection molding machine attracts attention and extensive research of researchers at home and abroad.
At present, an automatic mold adjusting method of a precision injection molding machine is mainly an automatic mold adjusting method based on a dichotomy, and the automatic mold adjusting method based on the dichotomy continuously divides a section where an optimal mold adjusting position is located into two sections, so that two end points of the section gradually approach the optimal mold adjusting position, and further an approximate value of the optimal mold adjusting position is obtained. The automatic die adjusting method based on the dichotomy is a progressive die adjusting method, and the number of times of pressing dies required for completing automatic die adjusting is at least four or five times, so that the defect of overlong die adjusting period exists.
Disclosure of Invention
The invention aims to solve the technical problem of providing the automatic die adjusting method of the precision injection molding machine, which can finish automatic die adjusting only by twice die pressing and has short die adjusting period.
The technical scheme adopted for solving the technical problems is as follows: an automatic die adjusting method of a precision injection molding machine comprises the following steps:
step 1, constructing a die adjusting information table of the precise injection molding machine, wherein the die adjusting information table comprises two columns of data: the first column of data is a 'mode adjusting position' (positive integer, unit is tooth), the second column of data is a 'minimum set pressure' (positive integer, unit is Bar), the two columns of data are in one-to-one correspondence, each mode adjusting position corresponds to a minimum set pressure, the 'mode adjusting position' and the 'minimum set pressure' are stored in a mode adjusting information table in the form of data pairs, and each group of data pairs, the 'minimum set pressure' is the minimum value of a high-voltage mode locking pressure set value required by the lighting of a mode closing terminal IO when Guan Moya mode actions are executed on the corresponding 'mode adjusting position'; the specific process for constructing the 'mode adjustment information table' comprises the following steps:
step 1-1, setting a high-pressure mode locking pressure set value P as the pressure upper limit P of the precise injection molding machine max The optimal die adjusting position is obtained by using an automatic die adjusting method based on a dichotomy and is marked as x max The method comprises the steps of carrying out a first treatment on the surface of the Setting a high-pressure mode locking pressure set value P as a pressure lower limit P of a precision injection molding machine min The optimal die adjusting position is obtained by using an automatic die adjusting method based on a dichotomy and is marked as x min Up to this point, the number of data pairs to be constructed to determine the "modulo information table" is n=x max -x min +1, the k-th data pair in the "modulo information table" is denoted as (x) k ,P k ) K=1, 2,3, N, wherein the 1 st data pair (x 1 ,P 1 ) Is (x) min ,P min ) Nth set of data pairs (x N ,P N ) Is (x) max ,P max ) The data pairs to be acquired are the data pairs from the 2 nd group to the N-1 th group; setting a variable t, and initializing t to 1;
step 1-2, recording the lower limit of a zone where the minimum set pressure of the precision injection molding machine is located as a, and initializing a as P min The upper limit is b, b is initialized to P max ；
Step 1-3, judging whether t is equal to N-1, if so, jumping to step 1-6; otherwiseUpdating the current value of t to be t, adding 1, executing the die opening action, and further adjusting the die into 1 tooth to obtain the current die adjusting position marked as x t The current 'mode adjusting position' x t Corresponding "minimum set pressure" P t The section is set to (a, b)]Step 1-4 is carried out, wherein the values of a and b are the current latest values;
step 1-4, calculating the 'mode adjustment position' x by means of a dichotomy t Corresponding "minimum set pressure" P t The specific process is as follows:
A. judging whether the formula (B-a) is more than 1, if so, entering the step B; if not, jumping to the step 1-5, wherein the values of a and b are the current latest values;
B. setting a high-pressure mold locking pressure set value P of the precise injection molding machine as (a+b)/2, wherein the values of a and b are the current latest values;
C. executing the mold closing action, when the numerical value of the switch mold electronic ruler is unchanged, continuously T (P low /P max ) After +0.2 seconds, the template is considered to be conforming and stationary, where T (P low /P max ) For the maximum time required for the hydraulic pressure to reach the low pressure die set pressure after the precise injection molding machine die is just attached, T is the maximum pressure P from 0 to the hydraulic pressure of the precise injection molding machine max Time required, P low The value 0.2 is the additional compensation time for the set value of the low pressure die holding pressure to ensure that the hydraulic pressure has enough time to reach the low pressure die holding pressure;
D. executing the pressing operation, when the numerical value of the switch mode electronic ruler is unchanged and continuously T (P/P) max ) After +0.2 seconds, judging whether a closing terminal IO point is lightened, if so, updating the value of the lower limit a of the section where the minimum set pressure is located to the value of the current high-pressure mode locking pressure set value P; otherwise, updating the value of the upper limit b of the interval where the minimum set pressure is located to the value of the current high-pressure mode locking pressure set value P; after the updating is finished, executing the die opening action, and turning to the step A;
step 1-5, firstly setting a 'mold adjusting position' x t Corresponding "minimum set pressure" P t B, where b takes its current latest value, then "most recentThe value of the lower limit a of the interval where the small set pressure is located is updated to P t Then the value of the upper limit b of the interval where the minimum set pressure is located is updated to P max Jumping to the step 1-3;
step 1-6, constructing a 'mode adjustment information table';
step 2, when automatic die adjustment is needed, pressing an automatic die adjustment button of the precise injection molding machine, and entering an automatic die adjustment stage of the precise injection molding machine, wherein the specific process is as follows:
step 2-1, executing Guan Moya mould action, if the final IO of the mould closing is not lightened, adjusting M teeth (M is an integer which is more than or equal to 1 and less than or equal to M, and M is the maximum tooth number which can be adjusted back), continuously executing the mould closing mould pressing action until the final IO of the mould closing is lightened, and then adjusting the mould to the bottom; if the closing terminal IO is lightened, directly adjusting the die to the bottom; after the die is adjusted to the bottom, the die adjusting position is recorded as 0;
step 2-2, according to the high-pressure mold locking pressure P E [ P ] of the precision injection molding machine set by a user min ,P max ) Checking the 'mode adjusting information table' to obtain the optimal mode adjusting position, wherein the 'minimum setting pressure' { P 2 ,P 3 ,...,P N-1 The interval where the setting value is located [ P ] min ,P max ) Divided into N-1 intervals, so that P E [ P ] is set for any given value min ,P max ) Positive integer j e [1, N-1 ] must exist]So that P is E [ P ] j ,P j+1 ) Then, the optimal mold adjusting position corresponding to the high-pressure mold locking pressure set value P of the precision injection molding machine is x j ；
Step 2-3, die adjusting and feeding x j +1 teeth, reaching the die-adjusting position x j+1 ；
Step 2-4, executing Guan Moya mode action, judging whether the mode closing terminal IO is lightened, and if not, entering step 2-5; otherwise, marking the abnormality of the 'die adjusting information table', repeatedly executing the die adjusting and feeding 1 tooth-Guan Moya die action until the die closing end IO is lightened, further adjusting and removing 1 tooth, finishing die adjusting, and recording the final die adjusting position x real The method is used for self-adaptive revision of the post-module adjusting information table;
step 2-5, die adjustment and 1 tooth withdrawal;
step 2-6, execution Guan MoyaThe mode action is carried out, whether the mode closing terminal IO is lightened or not is judged, if yes, the mode adjustment is completed; otherwise, marking the abnormality of the 'die adjusting information table', repeatedly executing the die adjusting and removing 1 tooth-Guan Moya die action until the end IO of the die closing is lightened, the die adjusting is completed, and recording the final die adjusting position x real The method is used for self-adaptive revising of the post-module adjusting information table.
The self-adaptive revising process of the mode adjustment information table in the step 2-4 is as follows: according to the actual mold adjusting position x corresponding to the high-pressure mold locking pressure set value P of the precise injection molding machine real The data to be corrected in the mode adjustment information table is determined as follows: "die position" x j+1 ,x j+2 ,...,x real Corresponding "minimum set pressure" P j+1 ,P j+2 ,...,P real Will P j+1 ,P j+2 ,...,P real And (3) resetting the value of the die locking pressure set value P of the high-pressure die locking pressure of the precision injection molding machine, and completing the self-adaption of the die adjusting information table.
The self-adaptive revising process of the mode adjustment information table in the step 2-6 is as follows: according to the actual mold adjusting position x corresponding to the high-pressure mold locking pressure set value P of the precise injection molding machine real The data to be corrected in the mode adjustment information table is determined as follows: "die position" x real+1 ,...,x j-1 ,x j Corresponding "minimum set pressure" P real+1 ,...,P j-1 ,P j Will P real+1 ,...,P j-1 ,P j The values of (2) are reset to P+1, so that the adaptation of the modular information table is completed.
Compared with the prior art, the invention has the advantages that the mode adjusting information table is constructed firstly, and comprises two columns of data: the first column of data is a 'mold adjusting position' (positive integer, unit is tooth), the second column of data is a 'minimum set pressure' (positive integer, unit is Bar), then when the mold is automatically adjusted in the follow-up process, the corresponding mold adjusting position is obtained from a 'mold adjusting information table' according to the high-pressure mold locking pressure of the precision injection molding machine set by a user, the mold adjusting can be automatically adjusted only by pressing twice, the 'mold adjusting information table' is constructed once, in the follow-up automatic mold adjusting process, each mold adjusting data can be fed back to the 'mold adjusting information table', the 'mold adjusting information table' can be adaptively updated, the 'mold adjusting information table' follows the state of the machine, the mold adjusting speed is further optimized, the automatic mold adjusting can be completed only by pressing twice, the mold adjusting period is short, and compared with the existing method, the mold adjusting time is shortened by about 19 seconds (55%), and the maximum mold adjusting time is shortened by 32 seconds (68%).
Drawings
FIG. 1 is a diagram showing the comparison of the automatic mold adjusting method of the precision injection molding machine according to the present invention and the mold adjusting time of the existing automatic mold adjusting method based on the dichotomy;
FIG. 2 is a graph showing the comparison of the mold adjusting time before and after the adaptation of the "mold adjusting information table" in the automatic mold adjusting method of the precision injection molding machine of the present invention.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
Examples: an automatic die adjusting method of a precision injection molding machine comprises the following steps:
step 1, constructing a die adjusting information table of the precise injection molding machine, wherein the die adjusting information table comprises two columns of data: the first column of data is a 'mode adjusting position' (positive integer, unit is tooth), the second column of data is a 'minimum set pressure' (positive integer, unit is Bar), the two columns of data are in one-to-one correspondence, each mode adjusting position corresponds to a minimum set pressure, the 'mode adjusting position' and the 'minimum set pressure' are stored in a mode adjusting information table in the form of data pairs, and each group of data pairs, the 'minimum set pressure' is the minimum value of a high-voltage mode locking pressure set value required by the lighting of a mode closing terminal IO when Guan Moya mode actions are executed on the corresponding 'mode adjusting position'; the specific process for constructing the 'mode adjustment information table' comprises the following steps:
step 1-1, setting a high-pressure mode locking pressure set value P as the pressure upper limit P of the precise injection molding machine max The optimal die adjusting position is obtained by using an automatic die adjusting method based on a dichotomy and is marked as x max The method comprises the steps of carrying out a first treatment on the surface of the Setting a high-pressure mode locking pressure set value P as a pressure lower limit P of a precision injection molding machine min The optimal die adjusting position is obtained by using an automatic die adjusting method based on a dichotomy and is marked as x min To this end, determine "mode adjustmentThe number of data pairs to be constructed of the information table "is n=x max -x min +1, the k-th data pair in the "modulo information table" is denoted as (x) k ,P k ) K=1, 2,3, N, wherein the 1 st data pair (x 1 ,P 1 ) Is (x) min ,P min ) Nth set of data pairs (x N ,P N ) Is (x) max ,P max ) The data pairs to be acquired are the data pairs from the 2 nd group to the N-1 th group; setting a variable t, and initializing t to 1;
step 1-2, recording the lower limit of a zone where the minimum set pressure of the precision injection molding machine is located as a, and initializing a as P min The upper limit is b, b is initialized to P max ；
Step 1-3, judging whether t is equal to N-1, if so, jumping to step 1-6; otherwise, updating the current value of t to be t and adding 1, executing the die opening action, and further adjusting the die to enter 1 tooth to obtain the current die adjusting position marked as x t The current 'mode adjusting position' x t Corresponding "minimum set pressure" P t The section is set to (a, b)]Step 1-4 is carried out, wherein the values of a and b are the current latest values;
step 1-4, calculating the 'mode adjustment position' x by means of a dichotomy t Corresponding "minimum set pressure" P t The specific process is as follows:
A. judging whether the formula (B-a) is more than 1, if so, entering the step B; if not, jumping to the step 1-5, wherein the values of a and b are the current latest values;
B. setting a high-pressure mold locking pressure set value P of the precise injection molding machine as (a+b)/2, wherein the values of a and b are the current latest values;
C. executing the mold closing action, when the numerical value of the switch mold electronic ruler is unchanged, continuously T (P low /P max ) After +0.2 seconds, the template is considered to be conforming and stationary, where T (P low /P max ) For the maximum time required for the hydraulic pressure to reach the low pressure die set pressure after the precise injection molding machine die is just attached, T is the maximum pressure P from 0 to the hydraulic pressure of the precise injection molding machine max Time required, P low Is protected for low pressureThe set value of the pressure, the value of 0.2 is the additional compensation time, so as to ensure that the hydraulic pressure has enough time to reach the low pressure die holding pressure;
D. executing the pressing operation, when the numerical value of the switch mode electronic ruler is unchanged and continuously T (P/P) max ) After +0.2 seconds, judging whether a closing terminal IO point is lightened, if so, updating the value of the lower limit a of the section where the minimum set pressure is located to the value of the current high-pressure mode locking pressure set value P; otherwise, updating the value of the upper limit b of the interval where the minimum set pressure is located to the value of the current high-pressure mode locking pressure set value P; after the updating is finished, executing the die opening action, and turning to the step A;
step 1-5, firstly setting a 'mold adjusting position' x t Corresponding "minimum set pressure" P t B, wherein the value of b is the current latest value, and then the value of the lower limit a of the interval where the minimum set pressure is located is updated to P t Then the value of the upper limit b of the interval where the minimum set pressure is located is updated to P max Jumping to the step 1-3;
step 1-6, constructing a 'mode adjustment information table';
step 2, when automatic die adjustment is needed, pressing an automatic die adjustment button of the precise injection molding machine, and entering an automatic die adjustment stage of the precise injection molding machine, wherein the specific process is as follows:
step 2-1, executing Guan Moya mould action, if the final IO of the mould closing is not lightened, adjusting M teeth (M is an integer which is more than or equal to 1 and less than or equal to M, and M is the maximum tooth number which can be adjusted back), continuously executing the mould closing mould pressing action until the final IO of the mould closing is lightened, and then adjusting the mould to the bottom; if the closing terminal IO is lightened, directly adjusting the die to the bottom; after the die is adjusted to the bottom, the die adjusting position is recorded as 0;
step 2-2, according to the high-pressure mold locking pressure P E [ P ] of the precision injection molding machine set by a user min ,P max ) Checking the 'mode adjusting information table' to obtain the optimal mode adjusting position, wherein the 'minimum setting pressure' { P 2 ,P 3 ,...,P N-1 The interval where the setting value is located [ P ] min ,P max ) Divided into N-1 intervals, so that P E [ P ] is set for any given value min ,P max ) Positive integer j e [1, N-1 ] must exist]So that P is E [ P ] j ,P j+1 ) Then, the optimal mold adjusting position corresponding to the high-pressure mold locking pressure set value P of the precision injection molding machine is x j ；
Step 2-3, die adjusting and feeding x j +1 teeth, reaching the die-adjusting position x j+1 ；
Step 2-4, executing Guan Moya mode action, judging whether the mode closing terminal IO is lightened, and if not, entering step 2-5; otherwise, marking the abnormality of the 'die adjusting information table', repeatedly executing the die adjusting and feeding 1 tooth-Guan Moya die action until the die closing end IO is lightened, further adjusting and removing 1 tooth, finishing die adjusting, and recording the final die adjusting position x real The method is used for self-adaptive revision of the post-module adjusting information table;
step 2-5, die adjustment and 1 tooth withdrawal;
step 2-6, executing Guan Moya mode action, judging whether the mode closing terminal IO is lightened, if yes, finishing mode adjustment; otherwise, marking the abnormality of the 'die adjusting information table', repeatedly executing the die adjusting and removing 1 tooth-Guan Moya die action until the end IO of the die closing is lightened, the die adjusting is completed, and recording the final die adjusting position x real The method is used for self-adaptive revising of the post-module adjusting information table.
In this embodiment, the adaptive revising process of the mode adjustment information table in step 2-4 is as follows: according to the actual mold adjusting position x corresponding to the high-pressure mold locking pressure set value P of the precise injection molding machine real The data to be corrected in the mode adjustment information table is determined as follows: "die position" x j+1 ,x j+2 ,...,x real Corresponding "minimum set pressure" P j+1 ,P j+2 ,...,P real Will P j+1 ,P j+2 ,...,P real And (3) resetting the value of the die locking pressure set value P of the high-pressure die locking pressure of the precision injection molding machine, and completing the self-adaption of the die adjusting information table.
In this embodiment, the adaptive revising process of the mode adjustment information table in step 2-6 is as follows: according to the actual mold adjusting position x corresponding to the high-pressure mold locking pressure set value P of the precise injection molding machine real The data to be corrected in the mode adjustment information table is determined as follows: "die position" x real+1 ,...,x j-1 ,x j Corresponding "minimum set pressure" P real+1 ,...,P j-1 ,P j Will P real+1 ,...,P j-1 ,P j The values of (2) are reset to P+1, so that the adaptation of the modular information table is completed.
As shown in FIG. 1, analysis of FIG. 1 shows that the mold adjusting time of the automatic mold adjusting method of the precision injection molding machine is shortened by about 19 seconds (55%) and 32 seconds (68%) at most.
The comparison of the mold adjusting time before and after the self-adaptation of the mold adjusting information table is shown in fig. 2, and the analysis of fig. 2 shows that the mold adjusting time is obviously shortened after the self-adaptation revision of the mold adjusting information table.
Claims (3)
1. An automatic die adjusting method of a precision injection molding machine is characterized by comprising the following steps:
step 1, constructing a die adjusting information table of the precise injection molding machine, wherein the die adjusting information table comprises two columns of data: the first column of data is a 'mode adjusting position', the value is a positive integer, the unit is a tooth, the second column of data is a 'minimum set pressure', the value is a positive integer, the unit is a Bar, the two columns of data are in one-to-one correspondence, each mode adjusting position corresponds to a minimum set pressure, the 'mode adjusting position' and the 'minimum set pressure' are stored in a mode adjusting information table in the form of data pairs, and each group of data pairs, the 'minimum set pressure' is the minimum value of a high-voltage mode locking pressure set value required by the lighting of a mode closing terminal IO when the Guan Moya mode action is executed on the corresponding 'mode adjusting position'; the specific process for constructing the 'mode adjustment information table' comprises the following steps:
step 1-1, setting a high-pressure mode locking pressure set value P as the pressure upper limit P of the precise injection molding machine max The optimal die adjusting position is obtained by using an automatic die adjusting method based on a dichotomy and is marked as x max The method comprises the steps of carrying out a first treatment on the surface of the Setting a high-pressure mode locking pressure set value P as a pressure lower limit P of a precision injection molding machine min The optimal tuning at this time is obtained by using an automatic tuning method based on a dichotomyDie position, denoted x min Up to this point, the number of data pairs to be constructed to determine the "modulo information table" is n=x max -x min +1, the k-th data pair in the "modulo information table" is denoted as (x) k ,P k ) K=1, 2,3, N, wherein the 1 st data pair (x 1 ,P 1 ) Is (x) min ,P min ) Nth set of data pairs (x N ,P N ) Is (x) max ,P max ) The data pairs to be acquired are the data pairs from the 2 nd group to the N-1 th group; setting a variable t, and initializing t to 1;
step 1-2, recording the lower limit of a zone where the minimum set pressure of the precision injection molding machine is located as a, and initializing a as P min The upper limit is b, b is initialized to P max ；
Step 1-3, judging whether t is equal to N-1, if so, jumping to step 1-6; otherwise, updating the current value of t to be t and adding 1, executing the die opening action, and further adjusting the die to enter 1 tooth to obtain the current die adjusting position marked as x t The current 'mode adjusting position' x t Corresponding "minimum set pressure" P t The section is set to (a, b)]Step 1-4 is carried out, wherein the values of a and b are the current latest values;
step 1-4, calculating the 'mode adjustment position' x by means of a dichotomy t Corresponding "minimum set pressure" P t The specific process is as follows:
A. judging whether the formula (B-a) is more than 1, if so, entering the step B; if not, jumping to the step 1-5, wherein the values of a and b are the current latest values;
B. setting a high-pressure mold locking pressure set value P of the precise injection molding machine as (a+b)/2, wherein the values of a and b are the current latest values;
C. executing the mold closing action, when the numerical value of the switch mold electronic ruler is unchanged, continuously T (P low /P max ) After +0.2 seconds, the template is considered to be conforming and stationary, where T (P low /P max ) For the maximum time required for the hydraulic pressure to reach the low pressure die set pressure after the precise injection molding machine die is just attached, T is the maximum pressure P from 0 to the hydraulic pressure of the precise injection molding machine max Time required, P low The value 0.2 is the additional compensation time for the set value of the low pressure die holding pressure to ensure that the hydraulic pressure has enough time to reach the low pressure die holding pressure;
D. executing the pressing operation, when the numerical value of the switch mode electronic ruler is unchanged and continuously T (P/P) max ) After +0.2 seconds, judging whether a closing terminal IO point is lightened, if so, updating the value of the lower limit a of the section where the minimum set pressure is located to the value of the current high-pressure mode locking pressure set value P; otherwise, updating the value of the upper limit b of the interval where the minimum set pressure is located to the value of the current high-pressure mode locking pressure set value P; after the updating is finished, executing the die opening action, and turning to the step A;
step 1-5, firstly setting a 'mold adjusting position' x t Corresponding "minimum set pressure" P t B, wherein the value of b is the current latest value, and then the value of the lower limit a of the interval where the minimum set pressure is located is updated to P t Then the value of the upper limit b of the interval where the minimum set pressure is located is updated to P max Jumping to the step 1-3;
step 1-6, constructing a 'mode adjustment information table';
step 2, when automatic die adjustment is needed, pressing an automatic die adjustment button of the precise injection molding machine, and entering an automatic die adjustment stage of the precise injection molding machine, wherein the specific process is as follows:
step 2-1, executing Guan Moya mould action, if the final IO of the mould closing is not lightened, adjusting M teeth, wherein M is an integer which is more than or equal to 1 and less than or equal to M, M is the maximum tooth number which can be adjusted, continuously executing the mould closing mould action until the final IO of the mould closing is lightened, and then adjusting the mould to the bottom; if the closing terminal IO is lightened, directly adjusting the die to the bottom; after the die is adjusted to the bottom, the die adjusting position is recorded as 0;
step 2-2, according to the high-pressure mold locking pressure P E [ P ] of the precision injection molding machine set by a user min ,P max ) Checking the 'mode adjusting information table' to obtain the optimal mode adjusting position, wherein the 'minimum setting pressure' { P 2 ,P 3 ,...,P N-1 The interval where the setting value is located [ P ] min ,P max ) Divided into N-1 intervals, so that P E [ P ] is set for any given value min ,P max ) Positive integer j e [1, N-1 ] must exist]So that P is E [ P ] j ,P j+1 ) Then, the optimal mold adjusting position corresponding to the high-pressure mold locking pressure set value P of the precision injection molding machine is x j ；
Step 2-3, die adjusting and feeding x j +1 teeth, reaching the die-adjusting position x j+1 ；
Step 2-4, executing Guan Moya mode action, judging whether the mode closing terminal IO is lightened, and if not, entering step 2-5; otherwise, marking the abnormality of the 'die adjusting information table', repeatedly executing the die adjusting and feeding 1 tooth-Guan Moya die action until the die closing end IO is lightened, further adjusting and removing 1 tooth, finishing die adjusting, and recording the final die adjusting position x real The method is used for self-adaptive revision of the post-module adjusting information table;
step 2-5, die adjustment and 1 tooth withdrawal;
step 2-6, executing Guan Moya mode action, judging whether the mode closing terminal IO is lightened, if yes, finishing mode adjustment; otherwise, marking the abnormality of the 'die adjusting information table', repeatedly executing the die adjusting and removing 1 tooth-Guan Moya die action until the end IO of the die closing is lightened, the die adjusting is completed, and recording the final die adjusting position x real The method is used for self-adaptive revising of the post-module adjusting information table.
2. The automatic mold adjusting method of the precision injection molding machine according to claim 1, wherein the adaptive revising process of the mold adjusting information table in the step 2-4 is as follows: according to the actual mold adjusting position x corresponding to the high-pressure mold locking pressure set value P of the precise injection molding machine real The data to be corrected in the mode adjustment information table is determined as follows: "die position" x j+1 ,x j+2 ,...,x real Corresponding "minimum set pressure" P j+1 ,P j+2 ,...,P real Will P j+1 ,P j+2 ,...,P real And (3) resetting the value of the die locking pressure set value P of the high-pressure die locking pressure of the precision injection molding machine, and completing the self-adaption of the die adjusting information table.
3. The automatic mold adjusting method of precision injection molding machine according to claim 1, wherein the mold adjusting information table in step 2-6The adaptive revision process is: according to the actual mold adjusting position x corresponding to the high-pressure mold locking pressure set value P of the precise injection molding machine real The data to be corrected in the mode adjustment information table is determined as follows: "die position" x real+1 ,...,x j-1 ,x j Corresponding "minimum set pressure" P real+1 ,...,P j-1 ,P j Will P real+1 ,...,P j-1 ,P j The values of (2) are reset to P+1, so that the adaptation of the modular information table is completed.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103950168A (en) * | 2014-05-05 | 2014-07-30 | 宁波伊士通技术股份有限公司 | Method for solving problem of die locking force change in production process of injection molding machine |
| WO2017157153A1 (en) * | 2016-03-16 | 2017-09-21 | 张忠信 | Automatic universal mould closing mechanism for use in die casting machine or injection moulding machine |
| CN110640983A (en) * | 2019-10-29 | 2020-01-03 | 宁波创基机械有限公司 | Automatic adjusting device and method for mold clamping force of injection molding machine |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103950168A (en) * | 2014-05-05 | 2014-07-30 | 宁波伊士通技术股份有限公司 | Method for solving problem of die locking force change in production process of injection molding machine |
| WO2017157153A1 (en) * | 2016-03-16 | 2017-09-21 | 张忠信 | Automatic universal mould closing mechanism for use in die casting machine or injection moulding machine |
| CN110640983A (en) * | 2019-10-29 | 2020-01-03 | 宁波创基机械有限公司 | Automatic adjusting device and method for mold clamping force of injection molding machine |
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